WO1999022454A2 - Übertragungskanalschätzung in telekommunikationssystemen mit drahtloser telekommunikation - Google Patents
Übertragungskanalschätzung in telekommunikationssystemen mit drahtloser telekommunikation Download PDFInfo
- Publication number
- WO1999022454A2 WO1999022454A2 PCT/DE1998/002894 DE9802894W WO9922454A2 WO 1999022454 A2 WO1999022454 A2 WO 1999022454A2 DE 9802894 W DE9802894 W DE 9802894W WO 9922454 A2 WO9922454 A2 WO 9922454A2
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- impulse response
- channel impulse
- transmitter
- receiver
- bts2
- Prior art date
Links
- 230000005540 biological transmission Effects 0.000 title claims abstract description 69
- 238000004891 communication Methods 0.000 title description 12
- 238000012549 training Methods 0.000 claims abstract description 11
- 101150080339 BTS1 gene Proteins 0.000 claims description 60
- 238000000034 method Methods 0.000 claims description 30
- -1 BTS2 Proteins 0.000 claims 22
- 238000012360 testing method Methods 0.000 abstract description 4
- 230000011664 signaling Effects 0.000 description 13
- 238000001514 detection method Methods 0.000 description 6
- 238000005516 engineering process Methods 0.000 description 5
- 238000010295 mobile communication Methods 0.000 description 5
- 238000011156 evaluation Methods 0.000 description 3
- 238000012545 processing Methods 0.000 description 3
- YVGGHNCTFXOJCH-UHFFFAOYSA-N DDT Chemical compound C1=CC(Cl)=CC=C1C(C(Cl)(Cl)Cl)C1=CC=C(Cl)C=C1 YVGGHNCTFXOJCH-UHFFFAOYSA-N 0.000 description 2
- 230000001413 cellular effect Effects 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 238000001228 spectrum Methods 0.000 description 2
- 108010009392 Cyclin-Dependent Kinase Inhibitor p16 Proteins 0.000 description 1
- 108010003272 Hyaluronate lyase Proteins 0.000 description 1
- 102100023087 Protein S100-A4 Human genes 0.000 description 1
- 230000002457 bidirectional effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000002596 correlated effect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 238000012552 review Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/04—Wireless resource allocation
- H04W72/044—Wireless resource allocation based on the type of the allocated resource
- H04W72/0446—Resources in time domain, e.g. slots or frames
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W24/00—Supervisory, monitoring or testing arrangements
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
- H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
- H04B7/08—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the receiving station
- H04B7/0837—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the receiving station using pre-detection combining
- H04B7/0842—Weighted combining
- H04B7/0845—Weighted combining per branch equalization, e.g. by an FIR-filter or RAKE receiver per antenna branch
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L25/00—Baseband systems
- H04L25/02—Details ; arrangements for supplying electrical power along data transmission lines
- H04L25/0202—Channel estimation
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W88/00—Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
- H04W88/02—Terminal devices
- H04W88/06—Terminal devices adapted for operation in multiple networks or having at least two operational modes, e.g. multi-mode terminals
Definitions
- transmitting and receiving devices are used for message processing and transmission in which
- the message processing and message transmission can take place in a preferred transmission direction (simplex mode) or in both transmission directions (duplex mode), 2) the message processing is analog or digital,
- FDMA Frequency Division Multiple Access
- TDMA Time Division Multiple Access
- CDMA Code Division Multiple Access
- the type of transmission according to (1) ... (3) is usually characterized by continuous (analog) signals, while the type of transmission according to (4) usually produces discontinuous signals (eg impulses, digital signals).
- the invention relates to a method for estimating transmission channels in telecommunication systems with wireless telecommunication according to the preambles of claims 1, 6, 9 and 11 and to transceivers for estimating transmission channels in telecommunication systems with wireless Telecommunications according to the preambles of claims 22, 27, 30 and 32.
- the radio telecommunications scenario of the second generation is currently in the micro or macro cell range from the GSM-specific radio telecommunications system based on the FDMA / TDMA / FDD transmission principle (Frequency Division Duplex)
- FIGURE 1 shows that for the transmission of user data on the traffic channel (Traffic CHannel TCH) from the publications “(1): Informatik Spektrum 14 (1991) June, No. 3, Berlin, DE; A. Mann: "The GSM standard - the basis for digital European mobile radio networks", pages 137 to 152; (2): R. Steele: Mobile Radio Communications, Pentech Press, 1992 (Reprint 1994), Chapter 8: The Pan-European Digi tal Cell ular Mobile Radio System - known as GSM, page 677 ff.; (3): teleko praxis 4/1993, P.
- TCH Traffic CHannel TCH
- GSM radio interface - elements and functions pages 17 and 24 "well-known TCH multi-frame, TDMA frame and TDMA time slot structure of GSM mobile radio - Concept in which the data embedded in the structure shown in accordance with the FDD principle in the uplink or uplink direction (uplink; transmission “mobile station -” base station ”) in the frequency band between 890 MHz and 915 MHz and in the downlink or downlink direction ( downlink; transmission “base station -» mobile station ”) in the frequency band between 935 MHz and 960 MHz.
- FIGURE 2 shows that from the publication "Message Technology Electronics 42 (1992) Jan./Feb. No. 1, Berlin, DE; U. Pilger "Structure of the DECT standard", pages 23 to 29 "known
- Multirah en, TDMA frame and TDMA time slot structure of the DECT mobile radio concept in which the data embedded in the structure shown according to the TDD principle in the downlink or downlink direction (downlink; transmission “base station - ⁇ mobile station”) in time slots 0 ... 11 and in the uplink or uplink (uplink; transmission "mobile station -> base station”) in time slots 12 ... 23.
- FIGURE 3 shows, starting from the publication sympathomimetic ⁇ nik Elektronik, Berlin 45, 1995, Book 1, Pages 10 to 14 and Book 2, Pages 24 to 27; P. Jung, B. Steiner: “Concept of a CDMA mobile radio system with common detection for the third generation of mobile telephony "a possible FDMA / TDMA / CDMA multiple access for the uplink (uplink; transmission direction" mobile station -> base station ”) and downlink (uplink; transmission direction" mobile station -> base station ”) a telecommunications system with CDMA, FDMA and TDMA multiple access components, for example a joint detection CDMA mobile radio concept, in which - as with the GSM system (see FIG. 1) - the data in accordance with the FDD principle in the uplink or upward direction (uplink; transmission "mobile station -> base station”) and in the downlink or downward direction (downlink; transmission "base station -» mobile station ”) are transmitted in different frequency bands.
- FIGURE 4 shows, starting from the representation of the multiple access in FIGURE 3, that from the publication septenentechnik Elektronik, Berlin 45, 1995, number 1, pages 10 to 14 and number 2, pages 24 to 27; P. Jung, B. Steiner: "Concept of a CDMA mobile radio system with common detection for the third generation of mobile radio", known time slot structure (burst structure) of the uplink (shown in FIG. 5 of the publication) (up link; transmission direction "handset -> base station”) of the Joint Detection CDMA mobile radio concept.
- FIGURE 5 shows on the basis of a GSM radio scenario with, for example, two radio cells and base stations (base transceiver station) arranged therein, a first base station BTS1 (Transmitter / receiver) a first radio cell FZ1 and a second base station BTS2 (transmitter / receiver) "illuminates" a second radio cell FZ2 omnidirectionally, a FDMA / TDMA / CDMA radio scenario in which the base stations BTS1, BTS2 use a for the FDMA / TDMA / CDMA radio scenario designed air interface with several mobile stations MS1 ...
- the base stations BTS1, BTS2 are connected in a known manner (cf. GSM telecommunication system) to a base station controller BSC (BaseStation Controller), which is used to control the base stations
- BSC BaseStation Controller
- the base station controller BSC is on its part via a mobile switching center MSC (M obile switching center) with the higher-level telecommunications network, for example the PSTN (Public Switched Telecommunication Network).
- the mobile switching center MSC is the administration center for the telecommunications system shown. It takes over the complete call management and, with attached registers (not shown), the authentication of the telecommunication participants and the location monitoring in the network.
- FIGURE 6 shows the basic structure of the base station BTS1, BTS2 designed as a transmitter / receiver
- FIGURE 7 shows the basic structure of the mobile station MT1 ... MT5 also designed as a transmitter / receiver.
- the base station BTS1, BTS2 takes over the sending and receiving of radio messages from and to the mobile station MTS1..MTS5, while the mobile station MT1 ... MT5 takes over the sending and receiving of radio messages from and to the base station BTS1, BTS2.
- the base station has a transmission antenna SAN and a reception antenna EAN
- the mobile station MT1... MT5 has an antenna ANT that can be controlled for transmission and reception by an antenna switchover AU.
- BTS2 receives at least one radio message FN with an FDMA / TDMA / CDMA component from at least one of the mobile stations MT1 ... MT5, while the mobile station MT1 ... MT5 in the downward direction (reception path) (Receive path) receives, for example, at least one radio message FN with an FDMA / TDMA / CDMA component from at least one base station BTS1, BTS2 via the common antenna ANT.
- the radio message FN consists of a broadband spread carrier signal with information modulated onto data symbols.
- the received carrier signal is filtered in a radio receiving device FEE and mixed down to an intermediate frequency, which in turn is subsequently sampled and quantized.
- the signal After an analog / digital conversion, the signal, which has been distorted on the radio path by multipath propagation, is fed to an equalizer EQL, which largely compensates for the distortions (Stw.: Synchronization).
- a channel estimator KS tries to estimate the transmission properties of the transmission channel TRC on which the radio message FN has been transmitted.
- the transmission properties of the channel are specified in the time range by the channel impulse response.
- the radio message FN is assigned (or in the present case by the mobile station MT1 ... MT5 or the base station BTS1, BTS2) a special additional information designed as a training information sequence in the form of a so-called Mitambel assigned.
- Equalized and separated signal components in a known manner. After equalization and separation, a symbol-to- Data converter SDW converted the existing data symbols into binary data. The original bit stream is then obtained from the intermediate frequency in a demodulator DMOD before the individual time slots are assigned to the correct logical channels and thus also to the different mobile stations in a demultiplexer DMUX.
- the bit sequence obtained is decoded channel by channel in a channel codec KC. Depending on the channel, the bit information becomes the control and signaling time slot or one
- Voice time slot assigned and - in the case of the base station (FIGURE 6) - the control and signaling data and the voice data for transmission to the base station controller BSC jointly transferred to an interface SS responsible for signaling and voice coding / decoding (voice codec), while - in Case of the mobile station (FIGURE 7) - the control and signaling data of a control and signaling unit STSE responsible for complete signaling and control of the mobile station and the voice data are transferred to a voice codec SPC designed for voice input and output.
- the speech data are stored in a predetermined data stream (e.g. 64kbit / s stream in the network direction or 13kbit / s stream from the network direction).
- a predetermined data stream e.g. 64kbit / s stream in the network direction or 13kbit / s stream from the network direction.
- the complete control of the base station BTS1, BTS2 is carried out in a control unit STE.
- the base station BTS1, BTS2 sends, for example, at least one radio message FN with an FDMA / TDMA / CDMA component to at least one of the mobile stations MT1 ... MT5, while the mobile station MT1 ... MT5 in the upward direction
- Transmission path via the common antenna ANT, for example at least one radio message FN with an FDMA / TDMA / CDMA Component sends at least one base station BTS1, BTS2.
- the transmission path begins at the base station BTS1, BTS2 in FIGURE 6 by the fact that in the channel codec KC control and signaling data and voice data received from the base station controller BSC via the interface SS are assigned to a control and signaling time slot or a voice time slot and channel by channel a bit sequence can be encoded.
- the transmission path begins at the mobile station MT1 ... MT5 in FIGURE 7 with the fact that in the channel codec KC speech data received from the speech codec SPC and control and signaling data received from the control and signaling unit STSE a control and Signaling time slot or a speech time slot are assigned and these are encoded channel by channel into a bit sequence.
- the bit sequence obtained in the base station BTS1, BTS2 and in the mobile station MT1 ... MT5 is in each case converted into data symbols in a data-to-symbol converter DSW. Subsequently, the data symbols are spread in a spreading device SPE with a subscriber-specific code.
- a burst generator BG consisting of a burst composer BZS and a multiplexer MUX
- a training information sequence in the form of a shared message for channel estimation is then added to the spread data symbols in the burst composer BZS, and the burst information obtained in this way is set to the correct time slot in the multiplexer MUX .
- the burst obtained is modulated at high frequency in a modulator MOD and converted to digital / analog before the signal obtained in this way is emitted as a radio message FN via a radio transmitter FSE on the transmit antenna SAN or the common antenna ANT.
- a radio transmitter FSE on the transmit antenna SAN or the common antenna ANT.
- the transmission properties of the mobile radio channel are characterized in the time domain by the channel impulse response. Particularly in TDMA-based mobile radio systems, attempts are therefore made in a known manner to estimate the channel impulse response of the mobile radio channel. You add training sequences or test signals, so-called midambles the message to be sent - in the case of TDMA-based telecommunications systems, the burst.
- the channel impulse response of the mobile radio channel can then be determined with the aid of the received signal, which originates from the training sequence or the test signals.
- the object on which the invention is based is to improve, simplify and optimize the estimation of wireless transmission channels in telecommunication systems.
- the idea on which the invention is based essentially consists in using correlations of different channel impulse responses. This can be achieved in that (i) a telecommunications subscriber [eg, according to FIG. 5, a system-internal subscriber at the mobile station MS1 ... MS5 and / or another system-internal subscriber at the mobile station MS1 ...
- a telecommunications subscriber eg, according to FIG. 5, a system-internal subscriber at the mobile station MS1 ... MS5 and / or another system-internal subscriber at the mobile station MS1 ...
- MS5 Internal connection or a non-system participant in the higher-level PST network (external connection)] who receives messages intended for him (in the case of TDMA-based telecommunication systems a participant to whom, for example, the time slot #n of a TDMA frame is assigned) also messages that are for other subscribers are determined and are transmitted in the same transmission direction (in the case of TDMA-based telecommunication systems, another subscriber to whom, for example, the time slot #nl of a TDMA frame is assigned) for channel estimation used.
- FIGURE 8 starting from FIGURE 6, the basic structure of a base station according to a first embodiment
- FIGURE 9 starting from FIGURE 7, the basic structure of a mobile station according to a first embodiment
- FIGURE 10 starting from FIGURE 6, the basic structure of a base station according to a second embodiment
- FIGURE 11 starting from FIGURE 7, shows the basic structure of a mobile station according to a second exemplary embodiment
- FIGURE 12 starting from FIGURE 6, the basic structure of a base station according to a third embodiment
- FIGURE 13 shows the basic structure of a mobile station according to a third exemplary embodiment
- FIGURE 14 starting from FIGURE 6, the basic structure of a base station according to a fourth embodiment.
- FIGURES 8 and 9 show the basic structure of the base station BTS1, BTS2 (FIGURE 8) and the mobile station, respectively, based on FIGURES 6 and 7
- FIGURE 9 The main difference between the respective structure according to FIGURES 6 and 7 and the respective Structure according to FIGURES 8 and 9 consists in that a modified channel estimator KS 'is used in the respective structure according to FIGURES 8 and 9.
- This channel estimator KS ' is designed such that, for example, starting from FIGURE 5, a system-internal participant at the mobile station MS1 ... MS5 and / or another system-internal participant at the mobile station MS1 ...
- MS5 internal connection
- a system-external participant in higher-level PST network external connection
- receives messages intended for it in the case of TDMA-based telecommunication systems, a subscriber to whom, for example, the time slot "n" of a TDMA frame is assigned
- also messages that are intended for other subscribers and in the same transmission direction are transmitted (in the case of TDMA-based telecommunications systems, another subscriber to whom, for example, the time slot “n-1” of a TDMA frame is assigned) are used for channel estimation.
- BER bit energy and noise power density
- FIGURES 10 and 11 show, according to a second exemplary embodiment, starting from FIGURES 6 and 7, the basic structure of the base station BTS1, BTS2 (FIGURE 10) and the mobile station MT1 ... MT5 (FIGURE 11).
- the essential difference between the respective structure according to FIGURES 6 and 7 and the respective structure according to FIGURES 10 and 11 is that an evaluation device AWE is provided in the respective structure according to FIGURES 10 and 11.
- This evaluation device AWE is bidirectionally assigned to or connected to the channel estimator KS and the control unit STE or the control and signaling unit STSE and forms special channel estimation means with these.
- channel estimation means differ from the respective channel estimator in that, by means of the evaluation device AWE controlled by the control unit STE or the control and signaling unit STSE, two of the respective channel estimators KS co ⁇ > ⁇ _ ⁇ > ⁇ > ⁇ o (- ⁇ o C ⁇ o C ⁇
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Power Engineering (AREA)
- Mobile Radio Communication Systems (AREA)
- Time-Division Multiplex Systems (AREA)
- Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
- Monitoring And Testing Of Transmission In General (AREA)
Abstract
Description
Claims
Priority Applications (7)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP98955359A EP1038359A2 (de) | 1997-10-27 | 1998-09-30 | Übertragungskanalschätzung in telekommunikationssystemen mit drahtloser telekommunikation |
KR1020007004550A KR20010031509A (ko) | 1997-10-27 | 1998-09-30 | 무선 원격 통신용 통신 시스템의 전송 채널 평가 |
CA002308026A CA2308026A1 (en) | 1997-10-27 | 1998-09-30 | Transmission channel assessment in telecommunications systems using wire-free telecommunication |
AU12238/99A AU1223899A (en) | 1997-10-27 | 1998-09-30 | Estimation of transmission channels in communication systems for wireless telecommunication |
BR9813306-3A BR9813306A (pt) | 1997-10-27 | 1998-09-30 | Avaliação de canal de transmissão em sistemas de telecomunicação com telecomunicação sem fio |
JP2000518449A JP2001522157A (ja) | 1997-10-27 | 1998-09-30 | ワイヤレステレコミュニケーションを有するテレコミュニケーションシステムにおける伝送チャネル推定 |
US09/530,256 US6795427B1 (en) | 1997-10-27 | 1998-09-30 | Estimation of transmission channels in communication systems for wireless telecommunication |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19747369.5 | 1997-10-27 | ||
DE19747369A DE19747369A1 (de) | 1997-10-27 | 1997-10-27 | Übertragungskanalschätzung in Telekommunikationssystemen mit drahtloser Telekommunikation |
Publications (2)
Publication Number | Publication Date |
---|---|
WO1999022454A2 true WO1999022454A2 (de) | 1999-05-06 |
WO1999022454A3 WO1999022454A3 (de) | 1999-10-07 |
Family
ID=7846731
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/DE1998/002894 WO1999022454A2 (de) | 1997-10-27 | 1998-09-30 | Übertragungskanalschätzung in telekommunikationssystemen mit drahtloser telekommunikation |
Country Status (11)
Country | Link |
---|---|
US (1) | US6795427B1 (de) |
EP (1) | EP1038359A2 (de) |
JP (1) | JP2001522157A (de) |
KR (1) | KR20010031509A (de) |
CN (1) | CN1153370C (de) |
AU (1) | AU1223899A (de) |
BR (1) | BR9813306A (de) |
CA (1) | CA2308026A1 (de) |
DE (1) | DE19747369A1 (de) |
RU (1) | RU2235430C2 (de) |
WO (1) | WO1999022454A2 (de) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US7346126B2 (en) | 2001-11-28 | 2008-03-18 | Telefonaktiebolaget L M Ericsson (Publ) | Method and apparatus for channel estimation using plural channels |
US8681810B2 (en) | 2006-04-13 | 2014-03-25 | Qualcomm Incorporated | Dynamic carrier sensing thresholds |
US8913695B2 (en) | 2007-03-12 | 2014-12-16 | Qualcomm Incorporated | Hybrid pilot configuration |
Families Citing this family (37)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE19917334A1 (de) * | 1999-04-16 | 2000-10-26 | Siemens Ag | Mittambelstruktur für TD-CDMA-Mobilfunksysteme |
EP1091533B1 (de) * | 1999-10-07 | 2006-10-04 | Robert Bosch Gmbh | Verfahren und Anordnung zur Kanalschätzung in einem mobilen Kommunikationssystem |
US8831130B1 (en) | 1999-10-16 | 2014-09-09 | Ipcom Gmbh & Co. Kg | Channel estimate predicted from several previous channel estimates, for pre-equalization |
AUPQ883200A0 (en) * | 2000-07-18 | 2000-08-10 | Telefonaktiebolaget Lm Ericsson (Publ) | Telecommunication system and method of communicating protocol information |
DE10115583B4 (de) * | 2001-03-29 | 2012-07-12 | Siemens Ag | Verfahren und Vorrichtung zur Bildung eines Ähnlichkeitsmaßesund Kanalschätzung mittels Ähnlichkeitsmaß |
US20020183010A1 (en) * | 2001-06-05 | 2002-12-05 | Catreux Severine E. | Wireless communication systems with adaptive channelization and link adaptation |
US7068631B2 (en) * | 2001-08-06 | 2006-06-27 | Telefonaktiebolaget Lm Ericsson (Publ) | Training sequence hopping in a radio communication system |
US7039001B2 (en) | 2002-10-29 | 2006-05-02 | Qualcomm, Incorporated | Channel estimation for OFDM communication systems |
US7042857B2 (en) | 2002-10-29 | 2006-05-09 | Qualcom, Incorporated | Uplink pilot and signaling transmission in wireless communication systems |
US20040114681A1 (en) * | 2002-12-17 | 2004-06-17 | Ron Rotstein | Method for improving performance of wireless systems at high speeds |
CN100521667C (zh) * | 2003-03-03 | 2009-07-29 | 三菱电机株式会社 | 获取接收到的脉冲无线电信号的方法、系统和装置 |
US7177297B2 (en) | 2003-05-12 | 2007-02-13 | Qualcomm Incorporated | Fast frequency hopping with a code division multiplexed pilot in an OFDMA system |
JP2005135032A (ja) * | 2003-10-28 | 2005-05-26 | Toshiba Corp | ネットワーク情報設定方法、ネットワークシステム、ならびに通信端末装置 |
US8611283B2 (en) | 2004-01-28 | 2013-12-17 | Qualcomm Incorporated | Method and apparatus of using a single channel to provide acknowledgement and assignment messages |
US8891349B2 (en) | 2004-07-23 | 2014-11-18 | Qualcomm Incorporated | Method of optimizing portions of a frame |
US8238923B2 (en) | 2004-12-22 | 2012-08-07 | Qualcomm Incorporated | Method of using shared resources in a communication system |
US8831115B2 (en) | 2004-12-22 | 2014-09-09 | Qualcomm Incorporated | MC-CDMA multiplexing in an orthogonal uplink |
US8165167B2 (en) * | 2005-03-10 | 2012-04-24 | Qualcomm Incorporated | Time tracking for a communication system |
RU2286025C1 (ru) * | 2005-06-15 | 2006-10-20 | Игорь Борисович Дунаев | Способ передачи и приема сигналов квадратурной амплитудной модуляции, система для его осуществления, машиночитаемый носитель и применение способа для синхронизации приема сигналов квадратурной амплитудной модуляции |
US8619884B2 (en) | 2005-09-02 | 2013-12-31 | Qualcomm Incorporated | Communication channel estimation |
CN1980103B (zh) * | 2005-12-08 | 2012-02-29 | 中兴通讯股份有限公司 | 一种收发信机指标的测试装置及系统 |
EP1816813A1 (de) * | 2006-01-23 | 2007-08-08 | Koninklijke Philips Electronics N.V. | Schätzung der Länge der Kanalimpulsantwort |
CA2647643C (en) | 2006-04-17 | 2013-07-09 | Qualcomm Incorporated | Noise estimation for wireless communication |
US7974360B2 (en) | 2006-05-24 | 2011-07-05 | Qualcomm Incorporated | Multi input multi output (MIMO) orthogonal frequency division multiple access (OFDMA) communication system |
US8428197B2 (en) | 2006-06-01 | 2013-04-23 | Qualcomm Incorporated | Enhanced channel estimation for communication system receiver |
US8477593B2 (en) | 2006-07-28 | 2013-07-02 | Qualcomm Incorporated | Method and apparatus for sending signaling for data transmission in a wireless communication system |
US8085873B2 (en) | 2007-01-02 | 2011-12-27 | Qualcomm, Incorporated | Systems and methods for enhanced channel estimation in wireless communication systems |
US9071414B2 (en) | 2007-03-23 | 2015-06-30 | Qualcomm Incorporated | Method and apparatus for distinguishing broadcast messages in wireless signals |
CN101222274B (zh) | 2008-01-25 | 2013-02-27 | 中兴通讯股份有限公司 | 时分双工系统中同步信号的发送方法和装置 |
CN101795491A (zh) * | 2010-02-01 | 2010-08-04 | 中兴通讯股份有限公司 | 一种估计终端速度的方法及装置、终端和基站 |
CN101808070A (zh) * | 2010-04-13 | 2010-08-18 | 北京大学 | 一种ofdm系统接收机及其移动速度估计方法 |
CN102238569B (zh) * | 2010-04-22 | 2014-08-27 | 中兴通讯股份有限公司 | 估计终端移动速度的方法和装置 |
CN102025680A (zh) * | 2010-12-15 | 2011-04-20 | 华为技术有限公司 | 速度估计方法和装置 |
US9078205B2 (en) | 2012-03-09 | 2015-07-07 | Qualcomm Incorporated | Methods and apparatus for enabling non-destaggered channel estimation |
US9274912B2 (en) * | 2014-05-16 | 2016-03-01 | Verizon Patent And Licensing Inc. | Simulating burst errors in mobile data communication network system level simulations |
DE102014226141B4 (de) | 2014-12-16 | 2016-08-25 | Continental Automotive Gmbh | Verfahren zum Empfang von Rundfunksignalen in einem Empfangsgerät und Empfangsgerät |
EP3864426A1 (de) * | 2018-10-12 | 2021-08-18 | Inventio AG | System und verfahren zur positionsbestimmung in einem gebäude |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0535403A1 (de) * | 1991-10-01 | 1993-04-07 | Nec Corporation | Empfang eines TDMA digitalen Datensignals mit Ausgleich der Veränderung des Kanals |
EP0615352A1 (de) * | 1993-03-09 | 1994-09-14 | Nokia Mobile Phones Ltd. | Funktelefonsystem mit Trainingsfolge variabeler Länge |
US5566172A (en) * | 1992-12-30 | 1996-10-15 | Alcatel N.V. | Method for transmitting information at high speed by multiple burst allocation and associated receiving method and device |
DE19616829C1 (de) * | 1996-04-26 | 1997-04-24 | Siemens Ag | System zur Funkübertragung digitaler Signale zwischen mehreren Teilnehmerstationen und einer Basisstation |
Family Cites Families (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
AU3743993A (en) | 1992-04-09 | 1993-11-18 | Siemens Aktiengesellschaft | Method of structuring a B-field format in a DECT-standard system |
DE4233222C2 (de) | 1992-10-02 | 1995-07-20 | Siemens Ag | Meßsystem (Channel Sounder) zur Untersuchung von Mobilfunkkanälen |
FR2724084B1 (fr) * | 1994-08-31 | 1997-01-03 | Alcatel Mobile Comm France | Systeme de transmission d'informations par un canal de transmission variant dans le temps, et equipements d'emission et de reception correspondants |
DE19506117C1 (de) * | 1995-02-22 | 1996-08-08 | Siemens Ag | Verfahren und Anordnung zur Schätzung der Impulsantwort eines Übertragungskanals |
DE19506109C1 (de) * | 1995-02-22 | 1996-06-05 | Siemens Ag | Verfahren und Anordnung zur Schätzung der Impulsantwort eines Übertragungskanals |
CN1185885A (zh) * | 1995-05-31 | 1998-06-24 | 西门子公司 | 具有isdn连接的蜂窝无绳电信系统 |
JP3171597B2 (ja) * | 1995-05-31 | 2001-05-28 | ジーメンス アクティエンゲゼルシャフト | セルラー無線通信システム用移動無線受信機 |
DE19523327C2 (de) * | 1995-06-27 | 2000-08-24 | Siemens Ag | Verfahren zur verbesserten Schätzung der Impulsantwort eines Übertragungskanals |
EP0767543A3 (de) * | 1995-10-06 | 2000-07-26 | Siemens Aktiengesellschaft | Kodemultiplexnachrichtenübertragung mit Interferenzunterdrückung |
WO2001011797A1 (en) * | 1999-08-10 | 2001-02-15 | Airnet Communications Corporation | Translating repeater system with improved backhaul efficiency |
-
1997
- 1997-10-27 DE DE19747369A patent/DE19747369A1/de not_active Ceased
-
1998
- 1998-09-30 CN CNB988106221A patent/CN1153370C/zh not_active Expired - Fee Related
- 1998-09-30 RU RU2000113208/09A patent/RU2235430C2/ru not_active IP Right Cessation
- 1998-09-30 EP EP98955359A patent/EP1038359A2/de not_active Ceased
- 1998-09-30 JP JP2000518449A patent/JP2001522157A/ja active Pending
- 1998-09-30 CA CA002308026A patent/CA2308026A1/en not_active Abandoned
- 1998-09-30 BR BR9813306-3A patent/BR9813306A/pt not_active IP Right Cessation
- 1998-09-30 WO PCT/DE1998/002894 patent/WO1999022454A2/de not_active Application Discontinuation
- 1998-09-30 AU AU12238/99A patent/AU1223899A/en not_active Abandoned
- 1998-09-30 KR KR1020007004550A patent/KR20010031509A/ko not_active IP Right Cessation
- 1998-09-30 US US09/530,256 patent/US6795427B1/en not_active Expired - Fee Related
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0535403A1 (de) * | 1991-10-01 | 1993-04-07 | Nec Corporation | Empfang eines TDMA digitalen Datensignals mit Ausgleich der Veränderung des Kanals |
US5566172A (en) * | 1992-12-30 | 1996-10-15 | Alcatel N.V. | Method for transmitting information at high speed by multiple burst allocation and associated receiving method and device |
EP0615352A1 (de) * | 1993-03-09 | 1994-09-14 | Nokia Mobile Phones Ltd. | Funktelefonsystem mit Trainingsfolge variabeler Länge |
DE19616829C1 (de) * | 1996-04-26 | 1997-04-24 | Siemens Ag | System zur Funkübertragung digitaler Signale zwischen mehreren Teilnehmerstationen und einer Basisstation |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US7346126B2 (en) | 2001-11-28 | 2008-03-18 | Telefonaktiebolaget L M Ericsson (Publ) | Method and apparatus for channel estimation using plural channels |
US8681810B2 (en) | 2006-04-13 | 2014-03-25 | Qualcomm Incorporated | Dynamic carrier sensing thresholds |
US8913695B2 (en) | 2007-03-12 | 2014-12-16 | Qualcomm Incorporated | Hybrid pilot configuration |
Also Published As
Publication number | Publication date |
---|---|
JP2001522157A (ja) | 2001-11-13 |
BR9813306A (pt) | 2000-11-28 |
RU2235430C2 (ru) | 2004-08-27 |
DE19747369A1 (de) | 1999-05-06 |
EP1038359A2 (de) | 2000-09-27 |
CN1278376A (zh) | 2000-12-27 |
AU1223899A (en) | 1999-05-17 |
WO1999022454A3 (de) | 1999-10-07 |
KR20010031509A (ko) | 2001-04-16 |
US6795427B1 (en) | 2004-09-21 |
CN1153370C (zh) | 2004-06-09 |
CA2308026A1 (en) | 1999-05-06 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
WO1999022454A2 (de) | Übertragungskanalschätzung in telekommunikationssystemen mit drahtloser telekommunikation | |
EP1092296B1 (de) | Luftschnittstelle für telekommunikationssysteme mit drahtloser telekommunikation zwischen mobilen und/oder stationären sende-/empfangsgeräten | |
EP1058977B1 (de) | Telekommunikationssysteme mit drahtloser, auf code- und zeitmultiplex basierender telekommunikation | |
EP1059012A1 (de) | Telekommunikationssysteme mit drahtloser, auf code- und zeitmultiplex basierender telekommunikation zwischen mobilen und/oder stationären sende-/empfangsgeräten | |
DE60020990T2 (de) | System und verfahren zur aufrechterhaltung der aufwärtssynchronisation in einem cdma-kommunikationssystem | |
DE69818142T2 (de) | TDMA Kommunikationssystem | |
EP1059011A1 (de) | Weiterreichen in einem auf code- und zeitmultiplex basierenden telekommunikationssystem | |
EP1058975B1 (de) | Tdd-telekommunikationssysteme mit drahtloser, auf code- und zeitmultiplex basierender telekommunikation | |
EP0997012A1 (de) | Drahtloses telekommunikationssystem mit einer cdma-, fdma- und tdma-vielfachzugriffskomponente, insbesondere ein bezüglich vielfachzugriffsmethoden hybrides "jd-cdma"-telekommunikationssystem | |
DE19747370C1 (de) | Telekommunikationssystem zur drahtlosen Telekommunikation mit einer CDMA-, FDMA- und TDMA-Vielfachzugriffskomponente | |
EP1133834B1 (de) | Verfahren zum steuern von speicherzugriffen bei "rake"-empfängern mit "early-late tracking" in telekommunikationssystemen | |
WO1999044314A1 (de) | Luftschnittstelle für heim-telekommunikationssysteme mit drahtloser, auf code- und zeitmultiplex basierender telekommunikation | |
EP1125370B1 (de) | Rake-empfänger in mobilfunksystemen der dritten generation | |
EP1072108A2 (de) | Telekommunikationssysteme mit drahtloser, auf code- und zeitmultiplex basierender telekommunikation | |
DE19849552A1 (de) | Verfahren zum Regeln der Sendeleistung von mobilen Sende-/Empfangsgeräten in Telekommunikationssystemen mit drahtloser Telekommunikation zwischen mobilen und/oder stationären Sende-/Empfangsgeräten, insbesondere in Mobilfunksystemen der dritten Generation | |
WO2000025530A2 (de) | Verfahren und anordnung zum schätzen von übertragungskanälen in mobilfunksystemen der dritten generation | |
EP1226659B1 (de) | Verfahren zur synchronisation einer signalübertragung in aufwärtsrichtung in einem funk-kommunikationssystem | |
DE19849559A1 (de) | Verfahren zum Herstellen der Zeitsynchronität zusätzlich zur Taktsynchronität auf der Empfängerseite in Telekommunikationssystemen mit drahtloser Telekommunikation zwischen mobilen und/oder stationären Sende-/Empfangsgeräten, insbesondere in Mobilfunksysteme der dritten Generation | |
DE19807960B4 (de) | Telekommunikationssystem zur drahtlosen Mobiltelekommunikation im TDD-Modus, insbesondere ein im ungepaarten Frequenzband arbeitendes Universal-Mobil-Telekommunikationssystem (UMTS) | |
DE19849533A1 (de) | Verfahren zum Steuern der Übertragung von Datenpaketen in Telekommunikationssystemen mit drahtloser Telekommunikation zwischen mobilen und/oder stationären Sende-/Empfangsgeräten, insbesondere in Mobilfunksystemen der dritten Generation | |
DE19849544A1 (de) | Synchroner Rake-Empfänger für Tlekommunikationssysteme mit drahtloser Telekommunikation zwischen mobilen und/oder stationären Sende-/Empfangsgeräten, insbesondere in Mobilfunksystemen der dritten Generation | |
WO2001037442A1 (de) | Verfahren zur signalübertragung in einem funk-kommunikationssystem | |
DE19849557A1 (de) | Verfahren zur hardwarebasierten Durchführung des Fingertracking eines Rake-Empfängers in Telekommunikationssystemen mit drahtloser Telekommunikation zwischen mobilen und/oder stationären Sende-/Empfangsgeräten, insbesondere in Mobilfunksystemen der dritten Generation |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
WWE | Wipo information: entry into national phase |
Ref document number: 98810622.1 Country of ref document: CN |
|
AK | Designated states |
Kind code of ref document: A2 Designated state(s): AU BR CA CN HU ID IL JP KR MX NO PL RU UA US VN |
|
AL | Designated countries for regional patents |
Kind code of ref document: A2 Designated state(s): AT BE CH CY DE DK ES FI FR GB GR IE IT LU MC NL PT SE |
|
121 | Ep: the epo has been informed by wipo that ep was designated in this application | ||
DFPE | Request for preliminary examination filed prior to expiration of 19th month from priority date (pct application filed before 20040101) | ||
AK | Designated states |
Kind code of ref document: A3 Designated state(s): AU BR CA CN HU ID IL JP KR MX NO PL RU UA US VN |
|
AL | Designated countries for regional patents |
Kind code of ref document: A3 Designated state(s): AT BE CH CY DE DK ES FI FR GB GR IE IT LU MC NL PT SE |
|
WWE | Wipo information: entry into national phase |
Ref document number: 1998955359 Country of ref document: EP |
|
ENP | Entry into the national phase |
Ref document number: 2308026 Country of ref document: CA Ref document number: 2308026 Country of ref document: CA Kind code of ref document: A |
|
WWE | Wipo information: entry into national phase |
Ref document number: 12238/99 Country of ref document: AU Ref document number: 09530256 Country of ref document: US |
|
WWE | Wipo information: entry into national phase |
Ref document number: 1020007004550 Country of ref document: KR |
|
WWP | Wipo information: published in national office |
Ref document number: 1998955359 Country of ref document: EP |
|
WWP | Wipo information: published in national office |
Ref document number: 1020007004550 Country of ref document: KR |
|
WWR | Wipo information: refused in national office |
Ref document number: 1020007004550 Country of ref document: KR |
|
WWR | Wipo information: refused in national office |
Ref document number: 1998955359 Country of ref document: EP |
|
WWW | Wipo information: withdrawn in national office |
Ref document number: 1998955359 Country of ref document: EP |